EDWARDS AIR FORCE BASE, Calif. - Space shuttle Endeavour is finally heading home, not from space but from California.

The shuttle took off from Edwards Air Force Base early Wednesday, riding piggyback atop a modified jumbo jet.

Depending on the weather along the route, the shuttle will arrive at the Kennedy Space Center in Florida either Thursday or Friday after spending the night at an intermediate stop.

Endeavour was supposed to leave California on Sunday, but a technical delay and bad weather postponed the trip.

The shuttle landed at the California backup site on Nov. 30 after storms hit its main Florida landing site. The cross-country ferry was expected to cost more than $1.8 million.